CN101476175A - Dyeable and antistatic polypropylene fiber and preparation thereof - Google Patents

Abstract

The invention relates to a dyeable and antistatic polypropylene fiber obtained by blending and spinning at least one dyeable polymer component and a polypropylene component, wherein the dyeable polymer component and the polypropylene component The weight ratio is 1:1.5-1:35; the dyeable polymer component is at least one selected from copolymers composed of polyglycol terephthalate and polyglycol. The blended fiber of the present invention can be spun into long and short fibers and used as woven fabric, knitted fabric, non-woven fabric or carpet yarn, and has good hygroscopicity, soft hand feeling, antistatic performance and high dyeing fastness.

Description

Dyeable and antistatic polypropylene fiber and its preparation method

technical field

The invention relates to a dyeable and antistatic polypropylene fiber, in particular to a hygroscopic, dyeable and antistatic polypropylene fiber prepared by blending spinning of pure high polymer and polypropylene without carbon powder and other conductive inorganic materials .

Background technique

As we all know, polypropylene fiber has good chemical stability, anti-fouling and abrasion resistance, light weight and good heat retention, and fine-denier polypropylene fiber also has excellent moisture conductivity and perspiration, so it has been widely used. However, polypropylene fibers also have certain defects, such as inability to dye, poor hygroscopicity, and easy generation of static electricity, which limit its further development and application.

The research on the modification of polypropylene fibers has aroused widespread interest. People have made a lot of efforts to improve the comprehensive properties such as dyeing performance, hygroscopicity, and antistatic properties. For example, some people have been working on the graft copolymerization of polypropylene fibers by using vinyl, acrylic, epoxy compounds, amide monomers, etc., while improving the dyeing performance of fibers, they can also properly improve the moisture absorption of polypropylene fibers. performance. Some people also use strong oxidants, halogenating agents, chlorosulfonating agents, sulfonating agents, etc. to chemically modify the surface of polypropylene fibers to form dyeable seats on the surface of the fibers. Some people use low-temperature plasma modification method to roughen the fiber surface, increase the specific surface area, and introduce polar groups at the same time to improve the hydrophilicity and dyeing performance of polypropylene fibers. However, these solutions have not been developed either due to technical reasons such as production operability, or due to high costs.

At present, the commonly used modification methods are mainly divided into two categories: one is to use composite spinning technology to improve the dyeing properties of polypropylene fibers, and obtain composite fibers with a skin-core structure. Usually, polypropylene is used as the core layer, and dyeable polymer is used as the skin layer. After dyeing, the skin layer is dyed, and the core layer polypropylene is not dyed; there are also polypropylene as the skin layer and dyeable polymer as the core layer. Short composite fiber, after dyeing, the skin layer polypropylene will not be dyed, and the core layer will be dyed, showing a hazy color tone. For example, the inventor once disclosed a "antistatic, moisture-absorbing, dyeable sheath-core composite fiber and its preparation method" (CN 2006 10002873.1), which carried out composite spinning through a twin-screw spinning machine and a composite spinneret. A composite fiber with a sheath-core structure is prepared by silk method, with the A-B type block copolyetherester polymer as the core component and the melt-spinnable fiber-forming polymer as the sheath component. Although the dyeability of the fiber has been improved, the process equipment requirements for composite spinning are high. Usually, two equipment extruders are required to melt and extrude the cortex and layered polymer respectively. The equipment is complicated, the investment cost is high, and the manufacturing Yield is not easy to improve, so the production cost is higher.

The other is to use blend spinning technology to improve the dyeability of polypropylene fibers, including: blending melt spinning of polypropylene and organic metal salts, that is, introducing metal ions into polypropylene fibers to make polypropylene fibers Dyeability is obtained, but must be dyed with special disperse mordant dyes. Some people use nanotechnology to prepare dyeable polypropylene, that is, to blend nanoparticles (such as clay) as dye seats with polypropylene, and combine them with dye molecules through van der Waals force and hydrogen bonds to dye, but the spinnability of this method poor. Related reports also show that the fibers obtained by blending and spinning polyethylene terephthalate and polypropylene can be dyed with disperse dyes at normal pressure, indicating that the interphase between the two phases of the non-compatible high polymer blend fiber There are a large number of gaps and holes that provide channels for dye diffusion and penetration. It is also reported that a proper amount of ethylene-vinyl acetate (EVA) or polystyrene (PS) and polypropylene are blended and spun to obtain disperse dye-dyeable polypropylene fibers. Blending polyamides and polyurethane polymers containing basic groups into polypropylene fibers can achieve acid dyeing. The blended fibers made of polymers with acidic functional groups (such as cationic dyeable polyester) and polypropylene can be dyed with cationic dyes.

Although a large number of high polymer and polypropylene blended spinning schemes have been reported, they all only involve the improvement of a certain performance of polypropylene fibers, such as improving dyeing or hygroscopicity alone, and polypropylene fibers have not been found in dyeing performance, It is reported that the comprehensive properties such as hygroscopicity and antistatic property have been significantly improved.

Someone once used high-molecular-weight polyoxyethylene (PEO) with strong hygroscopicity to blend with polypropylene to make fibers with good hygroscopic, dyeable and antistatic properties. However, PEO is easily soluble in hot water, and the antistatic properties of fabrics are lost due to the loss of PEO during the dyeing process; after that, the terminal hydroxyl groups of PEO are blocked in an attempt to reduce the solubility of PEO in water, in order to obtain durable antistatic properties. reported, but did not achieve the expected results.

Therefore, it is highly desirable to provide a polypropylene fiber with excellent hygroscopicity, dyeability and antistatic performance and a preparation method thereof.

Contents of the invention

A dyeable and antistatic polypropylene fiber obtained by blending and spinning at least one dyeable polymer component and polypropylene component, wherein the weight ratio of the dyeable polymer component to the polypropylene component is 1:1.5-1:35, preferably 1:2.5-1:20; the dyeable polymer component is selected from at least A sort of.

The main component of the dyeable polymer component of the present invention is a thermoplastic polyester elastomer (Thermo Plastic Ether Ester), that is, a block copolymer (A-B block copolymer) containing a polyester hard segment and a polyether soft segment ether esters). Among them, the polyether soft segment and the uncrystallized polyester form an amorphous phase, and the polyester hard segment forms a crystalline microdomain, which acts as a physical crosslinking point.

This A-B block copolyether ester is a copolymer of polyglycol terephthalate and polyglycol. Described polyglycol terephthalate can select polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate etc. for use; Polymers such as ethylene glycol, propylene glycol, and butanediol can be selected as the material, specifically, polytetramethylene glycol, polyethylene glycol, or polypropylene glycol.

Specifically, the dyeable polymer component can be selected from polyethylene terephthalate and polyethylene glycol, polyethylene terephthalate and polytetramethylene glycol, polyethylene terephthalate Alcohol Esters and Polypropylene Glycol, Polybutylene Terephthalate and Polyethylene Glycol, Polybutylene Terephthalate and Polybutylene Glycol, Polybutylene Terephthalate and Polypropylene Glycol, Polyethylene Glycol At least one of the copolymers of propylene terephthalate and polyethylene glycol, polytrimethylene terephthalate and polytetramethylene glycol, and copolymers of polytrimethylene terephthalate and polypropylene glycol.

The dyeable polymer component of the present invention preferably adopts commercialized thermoplastic polyester elastomer TPEE, which is terephthalic acid, 1,4-butylene glycol ester and polytetramethylene glycol, polypropylene glycol or polyethylene glycol Copolymerized. In the chemical composition of the thermoplastic polyester elastomer TPEE polymer, the crystallizable polyester component as a hard segment accounts for 25% to 70% of the mass. If the mass ratio is too small, the melting point of TPEE will decrease and the crystallization performance will deteriorate. , affect the pre-crystallization before spinning and the normal process of spinning; if the content is too much, the dyeability and antistatic performance of the final fiber will be poor; and the polyether component as a soft segment occupies 30% to 75% Too little content will affect the dyeability and antistatic performance of the final fiber, and too much will reduce the melting point of TPEE and deteriorate the crystallization performance, which will affect the pre-crystallization before spinning and the normal process of spinning. Usually, the mass ratio of hard segment/soft segment is preferably 30-55/70-45. It is generally preferred that the intrinsic viscosity of TPEE is in the range of 0.95 to 1.15 g/dl. If the intrinsic viscosity of TPEE is too low, the physical and mechanical properties of the final blended fiber product will be reduced, and due to the limitations of industrial production, it is difficult to obtain TPEE with a higher intrinsic viscosity.

The polypropylene component used in the present invention can use conventional fiber-grade resin raw materials, and its melt index [MI] is generally selected within the range of 17-50 g/10 min. If the melt index of polypropylene is too low, the operability of spinning will be poor; if it is too high, the physical and mechanical properties of the fiber will be deteriorated.

Dyeable and antistatic polypropylene fibers of the present invention can be prepared by the following methods:

First, dry the at least one dyeable polymer component above, such as the masterbatch chips of thermoplastic polyester elastomer TPEE; The filament component is extruded to obtain the raw filament of the fiber, and then the finished fiber is obtained through stretching, shaping and other processes.

Specifically, the dried thermoplastic polyester elastomer TPEE masterbatch chips and polypropylene chips can be mixed according to a certain ratio, and sent to a single-screw spinning equipment with a mixing device, and the two components are melt-mixed and blended. The final melt is metered by the metering pump and delivered to the spinning assembly. After the melt filament is extruded from the small hole of the spinneret, it is blown to cool, oiled, wound, stretched, and shaped to obtain a blended polyester fiber. Acrylic fibers.

According to different requirements, conventional low-speed spinning-drawing (UDY-DT), high-speed spinning-drawing (POY-DT), spinning-drawing combined one-step method (FDY), etc. can be used in the spinning process of polypropylene fiber. The processing technology is used to make drawn yarn, and it can also be processed into false twisted yarn by high-speed spinning-false twist texturing method (POY-DTY), and bulked filament (BCF) can also be prepared by spinning-drawing-texturing one-step method Process made into carpet silk.

The weight ratio of dyeable polymer masterbatch slices to polypropylene component slices is 1:1.5-1:35, preferably 1:2.5-1:20, and the content of dyeable polymer masterbatch slices should not be too high. A higher content of polymer components can significantly improve the hygroscopic performance, dyeability and antistatic performance of the fiber, but the operability of the spinning process will deteriorate, the fiber strength will decrease, and it is difficult to meet the requirements of textile processing; at the same time, when dyeable and polymerized When the content of masterbatch slices is too low, the proper functions such as moisture absorption, antistatic, and dyeability cannot be obtained.

In addition, it is worth pointing out that in order to improve the dyeing rate and color fastness (especially light fastness) of the fiber, in the process of the blend spinning of the present invention, on the basis of the above-mentioned dyeable polymer component and polypropylene component , also can add the third component polyester component in right amount, specifically the glycol ester of polyterephthalic acid can be selected, such as polybutylene terephthalate (PBT), polytrimethylene terephthalate ( PTT), polyethylene terephthalate (PET), etc. High temperature and high pressure cationic dyeable polyester (CDP), atmospheric pressure boiling cationic dyeable polyester (ECDP), atmospheric pressure boiling type disperse dyeable polyester (EDDP) and high shrinkage fiber can also be used Polyester (HSPET), etc. Preferred are PTT, PBT, HSPET and ECDP. The role of adding the third component is mainly to consider that the structure of the fiber can be loosened, which is beneficial to the penetration of the dye into the fiber, thereby improving the dyeing rate and color fastness of the fiber.

The added amount of the third component can be in the range of 0-30wt% of the total fiber, preferably in the range of 4%-20wt%.

The blended fiber of the present invention can be spun into long and short fibers and used as woven fabric, knitted fabric, non-woven fabric or carpet yarn, and has good hygroscopicity, soft hand feeling, antistatic performance and high dyeing fastness. It is suitable for carpets, underwear, underwear, shirts, outerwear, curtains, linings, wallpapers, sheets, quilts, stuffing cotton, and high-purity quiet environment work clothes in the electronics and pharmaceutical industries.

Detailed ways

The present invention will be further described by the following examples, obviously the present invention is not limited only to the following examples.

The fiber physical parameter determination method involved in the embodiment is as follows:

(1) K/S value of fiber:

The K/S value of fiber is the apparent depth of fiber dyeing, which refers to the intuitive depth feeling given to people by the color of opaque solid substances. The apparent depth value can be expressed by the Kuberlka-Munk (Kuberlka-Munk) function value, that is, the K/S value:

(K/S) _∞ ＝(1—R _∞ ) ² /2R _∞

Among them: K—absorption coefficient; S—scattering coefficient; R _∞ —reflectivity of colored sample with infinite thickness. The smaller the K/S value, the lighter the surface color; the larger the K/S value, the darker the surface color. In this paper, the Italian ORINTEX color measuring and matching system is used to measure the K/S value of the dyed sample.

(2) Determination of color fastness

1) Color fastness to rubbing

According to the national standard GB/T3920-1997, the color fastness to rubbing of the dyed samples is tested and evaluated. The samples are tested on the Y571A rubbing color fastness meter, and then the rubbing cloth is evaluated with a gray card under the standard light source box D65 light source Stain fastness.

2) Color fastness to washing

According to the national standard GB/T3921.1-1997, the color fastness to washing of the dyed sample is tested and evaluated on the SW-12 color fastness tester, and then under the standard light box D65 light source, with gray The card evaluates standard staining and sample fading.

3) Color fastness to sunlight

According to the national standard GB/T8427-1998, test and evaluate the light fastness of the dyed samples, measure the light fastness in the Q-Sun XE-3-HS xenon lamp test box, and then under the standard light box D65 light source, Use blue wool standard cloth to evaluate the color fastness of the samples.

(3) Determination of specific resistance

The conductivity of fibers is usually characterized by resistivity ρ, which is one of the important physical properties of fibers. In this paper, YG321 fiber specific resistance meter is used to measure the specific resistance of the blended polypropylene fiber. The specific resistance here refers to the volume specific resistance ρ _v , which usually refers to ρ _v when specific resistance is not specified. Fiber specific resistance ρ _v can be calculated by the following formula:

ρ _v =R·b·h·f/L=12R·f

In the formula, the unit of _ρv is (Ω·cm); R is the average resistance value of the measured fiber (Ω); b is the effective length of the electrode plate (4cm); h is the height of the electrode plate (6cm); L is the length of the electrode plate The distance between (2cm); f is the standard filling degree of the tested material. The standard filling degree f can be obtained by the formula:

f=m/(b·h·L·d)

Calculated, m is the weight (g) of the fiber to be tested, b, h, and L are the same as above, and d is the density (g/cm ³ ) of the fiber to be tested

Example 1:

The isotactic polypropylene PP with a melt index [MI]=17g/10min and the PBT-PEG copolyether ester with an intrinsic viscosity of 1.02dl/g and a melting temperature of 202°C (polybutylene terephthalate and A copolymer of polyethylene glycol, the mass ratio of polybutylene terephthalate and polyethylene glycol is 40/60); mixed in different proportions, in a single-screw melt spinning machine with a diameter of 25mm Melt in medium and mix evenly, and then the blended melt is sent to the spinning assembly quantitatively by the metering pump to extrude, after cooling, oiling and winding, the precursor of the blended fiber is obtained; the precursor is then processed according to BCF (Spinning-stretching-deformation one-step method to prepare bulky filaments) process to obtain finished fibers through stretching, shaping and deformation processing.

The number of spinneret holes is 24, the hole diameter is 0.30mm, and the aspect ratio is 2:1. The spinning temperature is 242°C, the winding speed is 800m/min, the draw ratio is 3.2 times, the stretching temperature is 65°C, and the setting temperature is 110°C. Using a variety of different polypropylene PP and copolyether ester blending ratios (mass ratio), when the blending ratio is 100/0 (non-blended fiber, as comparative example 1), 94/6, 90/10, 88 /12 and 85/15 have good spinnability, the linear density of the fiber is 80-85dtex, the breaking strength is in the range of 2.9-3.2cN/dtex, and the breaking elongation is 25%-45%. The spun fibers were tested with Disperse Golden Yellow E-3RL, Disperse Blue E-4R and Disperse Black EX-S for boiling dyeing test, color fastness and K/S value. The results are shown in Table 1 and Table 2. Compared with pure PP fiber, the dyeing performance has been significantly improved. It can dye medium and dark colors. The color fastness to friction, soaping and sunlight is above grade 4 except for some dyes (red), which also shows good performance. K/S value.

Table 1 Dyeing percentage/% of fibers with different blending ratios to different dyes

Note: boiling dyeing 40min

Table 2 Color fastness and K/S value of fibers with different blending ratios

Note: ① Disperse Red E-4B; ② Disperse Golden Yellow E-3RL; ③ Disperse Blue E-4R; ④ Disperse Black EX-S.

Comparative example 1:

Isotactic polypropylene PP with melt index [MI]=17g/10min (without adding TPEE, that is, PP/TPEE100/0) was spun into pure polypropylene under the same spinning equipment and basically the same process conditions as in Example 1. Acrylic fibers. For the convenience of comparison, the dyeing properties of the fibers are listed in Table 1. It can be seen that the pure polypropylene fiber is basically not dyed.

Determination of the specific resistance value of different blend ratio fibers listed in Table 1, the data are as follows:

Under standard conditions, the specific resistance value of polypropylene fiber is 6.53×10 ¹⁶ Ω·cm. The specific resistance values of the blended fibers with different blend ratios (94/6, 90/10, 88/12 and 85/15) were 3.22×10 ⁹ Ω·cm, 3.13×10 ⁸ Ω·cm, 2.24 ×10 ⁸ Ω·cm and 5.21×10 ⁷ Ω·cm; in a dry environment (18.0℃, RH45%), the specific resistance value of the blended fibers with the blend ratio of 94/6 and 90/10 is 9.91×10 ¹¹ and 5.67×10 ¹¹ Ω.cm. It can be seen that the specific resistance value of the blended fiber decreases with the increase of the copolyetherester content in the fiber, and decreases with the increase of the humidity in the air, which means that the antistatic performance of the blended fiber increases with the increase of the copolyetherester content. And improve.

Example 2:

12 parts (parts by mass) of pre-dried PBT-PBG copolyether ester (copolymerization of polybutylene terephthalate and polytetramethylene glycol) with an intrinsic viscosity of 1.05dl/g and a melting temperature of 210°C material, the mass ratio of hard segment/soft segment is 45/55) and 88 parts (mass parts) PP (MI=35) slices are uniformly mixed, melted in a single-screw melt spinning machine with a diameter of 30mm, and then The metering pump sends the blended melt to the spinning assembly quantitatively according to the regulations, extrudes, cools, oils, and winds to obtain the precursor of the blended fiber; the precursor is stretched and shaped to obtain the finished fiber. The number of spinneret holes is 24, the hole diameter is 0.25mm, the aspect ratio is 2, the spinning temperature is 236°C, the winding speed is 2200m/min, the stretching temperature is 70°C, the setting temperature is 125°C, and the stretching ratio is 2.4 times.

The fiber breaking strength is 3.4cN/dtex, and the breaking elongation is 21%. The fiber can be dyed into a medium-dark color with disperse dyes; the moisture regain rate under standard conditions is 1.59%; the specific resistance is 8.6×10 ⁸ Ω·cm. The blended fiber fabric was rubbed against the pure wool fabric, and the friction static voltage of the fiber was measured to be 0.25kv.

Comparative example 2:

The PP chips with [MI]=35 were spun on the same spinning equipment as in Example 2, then stretched and shaped to obtain finished pure polypropylene fibers. The spinning temperature is 234°C, the spinning speed is 2800m/min, the stretching temperature is 70°C, the setting temperature is 125°C, and the stretching ratio is 2.15 times.

The specific resistance of the fiber is 5.64×10 ¹⁶ Ω·cm, and cannot be dyed with disperse dyes.

Example 3:

The PP chips of [MI]=23 are pre-dried, and the same copolyetherester chips as in Example 2 are blended in a 92/8 (wt) ratio, and melt-spun on the same equipment as in Example 1, The spinning speed is 650m/min, and then stretched and shaped. The specific resistance of the blended fiber is 5.5×10 ¹¹ Ω·cm. After being boiled with disperse dyes under normal pressure, the specific resistance of the fiber is reduced to 2.1×10 ¹⁰ Ω cm.

Example 4:

The PP chip with [MI]=17 is pre-dried and the same chip as in Example 1 is blended in a ratio of 84/16 (wt), and then melt-spun, stretched, shaped, and expanded to obtain BCF blended fibers. The fiber forming process is carried out on the production device, the diameter of the screw is 120mm, the number of holes in the spinneret is 576, the hole diameter is 0.30mm, and the aspect ratio is 2:1. The spinning temperature is 240°C, the speed of the first winding roll is 400m/min, the draw ratio is 3.5 times, the stretching temperature is 85°C, the setting temperature is 126°C, and the winding speed is 1200m/min. The blended fiber was subjected to a section dyeing process, and the steaming time was controlled at 3 minutes. The results of various color fastness and K/S values after dyeing show that the fiber after space dyeing has good color fastness to washing and good rubbing fastness. Only red dye and disperse black EX-SF dyed fiber The light fastness is poor. The specific resistance of the blended fiber after dyeing was 5.5×10 ⁹ Ω·cm.

Example 5:

The isotactic polypropylene PP with melt index [MI]=17g/10min and intrinsic viscosity are 0.92dl/g, and melting temperature is the polytrimethylene terephthalate (PTT) chip of 229 ℃ and the same as embodiment 1 Copolyetherester (TPEE), mixed in different proportions as shown in Table 3, melted and uniformly mixed in a single-screw melt spinning machine with a diameter of 25 mm, and then the blended melt was quantitatively sent into the spinning machine by a metering pump. The filament assembly is extruded, cooled, oiled, and wound to obtain the precursor of the blended fiber; the precursor is stretched and shaped to obtain the finished fiber. The number of spinneret holes is 24, the hole diameter is 0.30mm, and the aspect ratio is 2:1. The spinning temperature is 248°C, the winding speed is 800m/min, the draw ratio is 3.1 times, the stretching temperature is 75°C, and the setting temperature is 125°C. Except for individual colors, the blended fibers have good dyeing performance and color fastness (see Table 3 and Table 4). The analysis results of fiber volume specific resistance show that the blended fiber has good antistatic performance (see Table 5), and the blended fiber still maintains good antistatic performance after dyeing and finishing.

Table 3 Dyeing percentage/% of fibers with different blending ratios to different dyes

Table 4 Color fastness and K/S value of fibers with different blending ratios

Note: ① Disperse Red E-4B; ② Disperse Golden E-3RL; ③ Disperse Blue E-4R.

Table 5 Specific resistance values of fibers with different blending ratios

Claims (10)

1. A dyeable and antistatic polypropylene fiber obtained by blending and spinning at least one dyeable polymer component and polypropylene component, wherein the weight of the dyeable polymer component and the polypropylene component is The ratio is 1:1.5-1:35; the dyeable polymer component is at least one selected from copolymers composed of polyglycol terephthalate and polyglycol. 2. The dyeable and antistatic polypropylene fiber according to claim 1, characterized in that the melt index [MI] of the polypropylene component is 17-50 g/10 min. 3. The dyeable and antistatic polypropylene fiber according to claim 1, characterized in that the weight ratio of the dyeable polymer component to the polypropylene component is 1:2.5-1:20. 4. The dyeable and antistatic polypropylene fiber according to claim 1, characterized in that the intrinsic viscosity of the dyeable polymer component is in the range of 0.95-1.15 g/dl. 5. The dyeable and antistatic polypropylene fiber according to claim 1, characterized in that the dyeable polymer component is selected from polyethylene terephthalate, polyethylene glycol, polypara Ethylene phthalate and polytetramethylene glycol, polyethylene terephthalate and polypropylene glycol, polybutylene terephthalate and polyethylene glycol, polybutylene terephthalate with polybutylene glycol, polybutylene terephthalate with polypropylene glycol, polytrimethylene terephthalate with polyethylene glycol, polytrimethylene terephthalate with polytetramethylene glycol and polytrimethylene terephthalate At least one of copolymers of esters and polypropylene glycol. 6. The dyeable and antistatic polypropylene fiber according to claim 1, characterized in that the blending and spinning temperature ranges from 228°C to 245°C. 7. The dyeable and antistatic polypropylene fiber according to claim 1, characterized in that a third component polyester component can also be added. 8. The dyeable and antistatic polypropylene fiber according to claim 7, characterized in that the third polyester component is selected from polyethylene terephthalate (PET), polypara Butylene phthalate (PBT), polytrimethylene terephthalate (PTT), high temperature and high pressure cationic dyeable polyester (CDP), atmospheric pressure boiling cationic dyeable polyester (ECDP), One or more of atmospheric pressure boiling type disperse dyeable polyester (EDDP) and high shrinkage fiber polyester (HSPET). 9. The dyeable and antistatic polypropylene fiber according to claim 7, characterized in that the third component polymer accounts for 4%-20wt% of the total fiber. 10. The dyeable and antistatic polypropylene fiber according to claim 7, characterized in that the third component polyester component can be selected from polybutylene terephthalate (PBT), polyparaphenylene Polypropylene terephthalate (PTT) or polyethylene terephthalate (PET).